they want to prove that trayvon martin attacked george zimmerman and that zimmerman shot the 17-year-old in self-defense. gunshot wound expert vincent dimao said the clothing was two to four inches away from martin's body. >> that this is consistent with mr. zimmerman's, that martin was over him, but his findings called into question were zimmerman intptionally targeted martin, pointed to other possibilities. >> is it sphept with mr. mar ten pulling away. he's pulling away and zimmerman shooting him at that time. >> yes. >> dimao explained despite the injury to zimmerman's head, the evidence doesn't reveal who initiated the confrontation that ultimately led to martin's death a judge ruled the jury will be aloud to hear testimony about the toxicology report showing there was marijuana in marren it's system when he died. reporting from sanford, florida. >> the retrial date for amanda knox is set for september 30th. knox's acquittal was overturned in march, so there were deficiencies and contradesks in the rulg. they are determining if knox and her former boyfriend killed her british roomma